Ignore dashes and apostrophes when finding dupes.

src/lib.rs

@@ -367,6 +367,8 @@ impl Movies {
             let parent = clean_path_parent(path)
                 .to_string_lossy()
                 .to_ascii_lowercase()
+                .replace("-", " ")
+                .replace("'", "")
                 .to_string();
             if date_re.is_match(&parent) {
                 movie_counter.entry(parent).or_insert(Vec::new()).push(m);